Episode 8.3 · 14 min
why Homo sapiens is the only human species left, and the Neanderthal and Denisovan DNA living people
Why are we the only human species left when our ancestors had children with Neanderthals and Denisovans? This episode follows those encounters from western Asia across Ice Age Europe and Asia, revealing how early pioneers vanished, how Denisovan DNA still helps many Tibetans live at high altitude, and how pieces of the Neanderthal genome remain in living people.
Watch this film on YouTube ↗Visual credits
33 sourcesSources and credits for imagery used in this film, including material incorporated into explanatory animations.
Natural Earth 1:50m land polygons
Natural Earth
View original source ↗Source licence: Public domainLand polygons and coastlines rendered with original colours and animated overlays.
Made with Natural Earth. Free vector and raster map data @ naturalearthdata.com.
Natural Earth 1:50m land polygons
Natural Earth
View original source ↗Source licence: Public domainLand polygons and coastlines reframed and rendered with original colours, site markers and animated overlays.
Made with Natural Earth. Free vector and raster map data @ naturalearthdata.com.
Misliya-1
Clumsystiggy
View original source ↗Source licence: CC BY 4.0Skhul V skull
Unità di Antropologia - Dip. di Biologia, Unipi
View original source ↗Source licence: CC BY 4.03D model rendered as a turntable animation; excerpted.
Homo neanderthalensis: La Ferrassie 1
Service de biologie du comportement (ULiège)
View original source ↗Source licence: CC BY 4.03D model rendered as a turntable animation; excerpted.
Harbin cranium: Homo longi holotype
Fu et al. (2025)
View original source ↗Source licence: CC BY 4.0Cropped and modified from Cell, Figure 1A, doi:10.1016/j.cell.2025.05.040. Frontal photograph padded for the screen; its outline also traced and simplified into the skull icon carried through the family-tree animations.
Harbin cranium, frontal view
Fu et al. (2025)
View original source ↗Source licence: CC BY 4.0Cropped and modified from Cell, Figure 1A, doi:10.1016/j.cell.2025.05.040; the complete frontal cranium is retained and padded with white to fit the screen.
Denisova Cave entrance
Демин Алексей Барнаул (Aleksei Demin)
View original source ↗Source licence: CC BY-SA 4.0Cropped to the cave mouth, excluding the poles.
Denisova Cave
Демин Алексей Барнаул (Aleksei Demin)
View original source ↗Source licence: CC BY-SA 4.0The cave-mouth portion is shown, cropped to exclude the poles.
Landscape of the Tibetan Plateau
Jan Kranendonk
View original source ↗Source licence: CC BY-SA 4.0Ilsenhöhle beneath Ranis castle and stone points from Ranis
Tim Schüler (TLDA); Josephine Schubert, Museum Burg Ranis
© Tim Schüler TLDA / Josephine Schubert, Museum Burg Ranis. Stone-tools image: CC BY-ND; credit Josephine Schubert, Museum Burg Ranis. Credit must be given to the creator. No derivatives or adaptations of the work are permitted.
Ranis leaf point, view 2b
Thilo Parg
View original source ↗Source licence: CC BY-SA 4.0Ranis leaf point, view 2a
Thilo Parg
View original source ↗Source licence: CC BY-SA 4.0Excavating the LRJ layers at Ranis
Marcel Weiss
© Marcel Weiss
Animal bone fragments from Ranis
Geoff M. Smith
Cropped to the animal bone fragments.
© Geoff M. Smith
Animal bones from Ranis
Geoff M. Smith
Only the animal-bone portion is shown.
© Geoff M. Smith
Human bone fragment from Ranis
Tim Schüler (TLDA)
© Tim Schüler TLDA
Zlatý kůň hill
Pastorius
View original source ↗Source licence: CC BY-SA 3.0Cropped to the hill, excluding the building.
Zlatý kůň at Koněprusy
Pastorius
View original source ↗Source licence: CC BY-SA 3.0The hill portion is shown, cropped to exclude the building.
CT reconstruction of the Zlatý kůň skull
Kay Prüfer, Cosimo Posth, He Yu, Alexander Stoessel, Maria A. Spyrou, Thibaut Deviese, Marco Mattonai, Erika Ribechini, Thomas Higham, Petr Velemínský, Jaroslav Brůžek and Johannes Krause
View original source ↗Source licence: CC BY 4.0Figure 1b cropped to the frontal and lateral skull reconstructions and scale bar; panel letter removed.
The Zlatý kůň fossil: virtual skull reconstruction
Kay Prüfer, Cosimo Posth, He Yu, Alexander Stoessel, Maria A. Spyrou, Thibaut Deviese, Marco Mattonai, Erika Ribechini, Thomas Higham, Petr Velemínský, Jaroslav Brůžek and Johannes Krause
View original source ↗Source licence: CC BY 4.0Only the frontal and lateral CT skull reconstructions and scale bar from Figure 1b are shown; panel letter removed.
Zlatý kůň skull photographs
Kay Prüfer, Cosimo Posth, He Yu, Alexander Stoessel, Maria A. Spyrou, Thibaut Deviese, Marco Mattonai, Erika Ribechini, Thomas Higham, Petr Velemínský, Jaroslav Brůžek and Johannes Krause
Extended Data Figure 1 cropped to skull photographs in panels a–b; panel letters removed using adjacent black background.
Skeletal remains from Zlatý kůň
Kay Prüfer, Cosimo Posth, He Yu, Alexander Stoessel, Maria A. Spyrou, Thibaut Deviese, Marco Mattonai, Erika Ribechini, Thomas Higham, Petr Velemínský, Jaroslav Brůžek and Johannes Krause
Only the skull photographs from Extended Data Figure 1, panels a–b, are shown; panel letters removed using adjacent black background.
Neanderthal ancestry along the Zlatý kůň chromosomes
Kay Prüfer, Cosimo Posth, He Yu, Alexander Stoessel, Maria A. Spyrou, Thibaut Deviese, Marco Mattonai, Erika Ribechini, Thomas Higham, Petr Velemínský, Jaroslav Brůžek and Johannes Krause
View original source ↗Source licence: CC BY 4.0Figure 3 cropped to panel b, retaining chromosome bars, ancestry segments, legend and axes.
Ilsenhöhle, Ranis: north cave
Ansgar Koreng
View original source ↗Source licence: CC BY 3.0 DENatural Earth 1:50m country boundaries
Natural Earth
View original source ↗Source licence: Public domainGermany and Czechia outlines selected and rendered faintly in an original map animation.
Made with Natural Earth. Free vector and raster map data @ naturalearthdata.com.
Natural Earth 1:50m country boundaries
Natural Earth
View original source ↗Source licence: Public domainGermany and Czechia outlines selected and rendered faintly in an original map animation.
Made with Natural Earth. Free vector and raster map data @ naturalearthdata.com.
Ilsenhöhle, Ranis: south cave
Ansgar Koreng
View original source ↗Source licence: CC BY 3.0 DELate-Neanderthal sites and sampled bones
Alba Bossoms Mesa, Elena Essel, Stéphane Peyrégne, Arev P. Sümer, Leonardo N. M. Iasi, Christian Heide, Divyaratan Popli, Cesare de Filippo, Marie-Theres Gansauge, Lars Gerullat, Laurin Lippik, Sarah Nagel, Birgit Nickel, Barbara Schellbach, Anna Schmidt, Johann Visagie, Antje Weihmann, Hugo Zeberg, Julia Zorn, Hélène Rougier, Isabelle Crevecoeur, Patrick Semal, Grégory Abrams, Thibaut Devièse, Stéphane Pirson, Kévin Di Modica, Pierre Cattelain, Christelle Draily, Michel Toussaint, Isabelle De Groote, Frido Welker, Cosimo Posth, Marie Soressi, Jean-Jacques Hublin, Johannes Krause, Svante Pääbo, Matthias Meyer, Janet Kelso, Benjamin M. Peter and Mateja Hajdinjak; bone photographs: E. Dewamme / Royal Belgian Institute of Natural Sciences, Hélène Rougier et al. and Q. Cosnefroy et al.; map data: Natural Earth
View original source ↗Source licence: CC BY 4.0Figure 1 cropped to panels a–b; panel letters, panel c, caption and body text excluded.
Bone pictures in panel b of Spy 94a and Spy 8 reproduced from E. Dewamme and copyright Royal Belgian Institute of Natural Sciences (RBINS), CC BY 4.0. Other bone pictures in panel b adapted from Rougier et al., Scientific Reports 6, 29005 (2016), and Cosnefroy et al., Scientific Reports 15, 40741 (2025), under CC BY 4.0. Map made with Natural Earth.
Spy 8 femur: Spy8DE
Royal Belgian Institute of Natural Sciences
View original source ↗Source licence: CC BY 4.03D model rendered as a turntable animation; excerpted.
Gorham's Cave Complex
Visit Gibraltar
View original source ↗Source licence: CC BY 2.0Gorham's Cave
Gibmetal77
View original source ↗Source licence: CC BY 3.0Baishiya Karst Cave
Dongju Zhang
View original source ↗Source licence: CC BY-SA 4.0
Stock footage
28 itemsLicensed stock footage used in this film, with each item’s creator and source page.
View of frozen valley at Iceland
ADDICTIVE_STOCK
Arctic Reindeer grazing in the frozen landscape of the Arctic circle
wildlifeandnaturestudios
Aerial View of Wild Horses Running Across a Snowy Field
cavanimages
Aerial footage over Mount Carmel And Wadi Oranit, Israel
ronib1979
Aerial video on Mount Carmel, on a sunny day at Maagan Michael Israel
world_footage
Herd of Gazelles Grazing on Green Grass
ronib1979
Cloud movement drifts over treeless arid Zagros mountains near Shiraz Iran
Pro-Stock
Frozen River Valley Landscape in Winter Aerial View
Xtremelevel
Aerial View of a Muddy River Winding Through a Dense Green Jungle
punyawee22
Yellow Larches and Mountains in Autumn, Aerial View. Altai, Russia
WhiteMountMedia
Scenic view of barren hills with snowy mountains
hu7886720
3 Bharal (Blue Sheep) move from snow to rocky mountain side in the Himalayas of India.
BlackBoxGuild
Herd of Yaks Grazing in Remote Mountain Pasture
evgeniyqw
Blizzard Conditions Across Snowy Mountain Landscape
Stockagent_io
Aerial View of Snowy Mountain Landscape in Winter
mountaikens
Aerial view of Ardennes forest in belgium orbit wide shot
BlackBoxGuild
Drone flight over water to a limestone cliff in Dordogne - France
BlackBoxGuild
Beautiful Panning Up Shot of Calm Vézère River with Bright Colorful Trees in Dordogne, France
BlackBoxGuild
Windy Snowstorm with Bare Trees in Winter
stu_dio_sd
Aerial view of tundra landscape with river
TDFly
Herd of Reindeer Walking Across Colorful Tundra
BlackBoxGuild
Distant Mountain Near Wavy Blue Ocean
BlackBoxGuild
Seals Swimming in Ocean near Rocky Shoreline
BlackBoxGuild
Aerial view of dolphins in the Mediterranean Sea, Spain.
AmazingAerial
Wild Mountain Goat On Rock In Spain
Anetlanda
Breathtaking Panoramic View of Snow-Capped Mountains at Sunset
BlackBoxGuild
Immune Cell Engulfing Virus Microscopic Animation
FrameStock
Yellow catkins growing on tree branch in daylight
ivz
Research references
Selected sources from the episode’s research and scientific figures.
- Vernot and Akey 2014 ↗
- Sümer ↗
- Chen 2020 ↗
- Li 2024 ↗
- Hershkovitz 2018 ↗
- critique ↗
- reply ↗
- Zaidner 2025 ↗
- Kuhlwilm 2016 ↗
- Platt et al. ↗
- Iasi 2024 ↗
- Vallini ↗
- Fu 2015 ↗
- Reilly 2026 ↗
- Larena 2021 ↗
- Xia 2024 ↗
- Rao ↗
- Ruan ↗
- Huerta-Sánchez 2014 ↗
- Peng 2017 ↗
- Zhang 2021 ↗
- Mylopotamitaki 2024 ↗
- Pederzani 2024 ↗
- Smith 2024 ↗
- Prüfer 2021 ↗
- MPI release ↗
- Higham 2014 ↗
- Devièse 2021 ↗
- Bossoms Mesa 2026 ↗
- Slimak 2024 ↗
- Burke 2026 ↗
- Churchill 2009 ↗
- Shanidar A primary study ↗
- Finlayson 2006 ↗
- Wood 2013 ↗
- Stringer 2008 ↗
- NHM ↗
- Skov 2020 ↗
- Dannemann 2016 ↗
- TLR erratum ↗
- Dannemann/Kelso 2017 ↗
- Zeberg 2020 ↗
- 2021 ↗
- Degioanni 2019 ↗
- Vaesen 2019 ↗
- Kolodny & Feldman 2017 ↗
- Hajdinjak 2021 ↗
- Staubwasser 2018 ↗
- Climate of the Past 19, 915 (2023) ↗
- Amadei 2025 ↗
- Timmermann 2020 ↗
- https://pubmed.ncbi.nlm.nih.gov/41747031/ ↗
- https://pmc.ncbi.nlm.nih.gov/articles/PMC9683707/ ↗
- https://www.gorhamscave.gi/gorhams-cave-complex/the-site ↗
- https://www.youtube.com/watch?v=lRXZjv7iM5k ↗
- https://openresearch-repository.anu.edu.au/items/268d20bb-998e-45e7-8e46-16661e113ddd ↗
- https://pmc.ncbi.nlm.nih.gov/articles/PMC4933530/ ↗
- https://english.tau.ac.il/node/3827 ↗
- https://doi.org/10.1038/s41586-019-1376-z ↗
- https://doi.org/10.1038/nature13810 ↗
- https://doi.org/10.1016/j.cell.2019.02.035 ↗
- https://doi.org/10.1101/2025.10.20.683404 ↗
- https://www.biorxiv.org/content/10.1101/2025.10.20.683404v1.full ↗
- https://www.biorxiv.org/content/10.64898/2026.05.06.723201v1.full ↗
- https://doi.org/10.1051/medsci/2026127 ↗
- https://pmc.ncbi.nlm.nih.gov/articles/PMC8596304/ ↗
- https://www.nature.com/articles/s41586-024-07612-9 ↗
- https://www.youtube.com/watch?v=cnXWXHP7QpA ↗
- https://www.youtube.com/watch?v=VhfPNntxK3k ↗
- https://pmc.ncbi.nlm.nih.gov/articles/PMC5400376/ ↗
- https://doi.org/10.1038/s41467-020-18638-8 ↗
- https://pmc.ncbi.nlm.nih.gov/articles/PMC8179186/ ↗
- https://doi.org/10.1126/science.aat8824 ↗
- https://www.eurekalert.org/multimedia/1013193 ↗
- https://pubmed.ncbi.nlm.nih.gov/21555570/ ↗
- https://pubmed.ncbi.nlm.nih.gov/41144685/ ↗
- https://evolutionaryanthropology.duke.edu/sites/evolutionaryanthropology.duke.edu/files/documents/Churchilleal2009.pdf ↗
- https://doi.org/10.1073/pnas.1411529111 ↗
- https://www.gorhamscave.gi/news/recent-discovery-at-vanguard-cave-19 ↗
- https://doi.org/10.1038/srep45940 ↗
- https://doi.org/10.1126/sciadv.abj9496 ↗
- https://pmc.ncbi.nlm.nih.gov/articles/PMC4716682/ ↗
- https://pmc.ncbi.nlm.nih.gov/articles/PMC4746360/ ↗
- https://pmc.ncbi.nlm.nih.gov/articles/PMC5630192/ ↗
- https://youtu.be/y25KCOKNcJE ↗
- https://youtu.be/bDOIjvl_SHs ↗
- https://youtu.be/uol9M4OMKlY ↗
- https://commons.wikimedia.org/wiki/File:Ilsenh%C3%B6hle,_Ranis,_Nordh%C3%B6hle,_151004,_ako.jpg ↗
- https://commons.wikimedia.org/wiki/File:Ilsenh%C3%B6hle,_Ranis,_S%C3%BCdh%C3%B6hle,_151004,_ako.jpg ↗
- https://commons.wikimedia.org/wiki/File:Jerzmanowice_point_Lincombian-Ranisian-Jerzmanowician_LRJ_2a.jpg ↗
- https://commons.wikimedia.org/wiki/File:Jerzmanowice_point_Lincombian-Ranisian-Jerzmanowician_LRJ_2b.jpg ↗
- https://commons.wikimedia.org/wiki/File:Skeletal_remains_from_Zlat%C3%BD_k%C5%AF%C5%88.jpg ↗
- https://commons.wikimedia.org/wiki/File:Gibraltar_1_skull_cast.jpg ↗
- https://commons.wikimedia.org/wiki/File:Gorham%27s_Cave.jpg ↗
- https://commons.wikimedia.org/wiki/File:Gorham%27s_Cave_Complex.jpg ↗
- https://commons.wikimedia.org/wiki/File:Qafzeh_6_cast.jpg ↗
- https://commons.wikimedia.org/wiki/File:Eingang_der_Qafzeh-H%C3%B6hle.jpg ↗
- https://commons.wikimedia.org/wiki/File:Stratigraphy_of_Qafzeh_Cave_Terrace_(Middle_Paleolithic).jpg ↗
- https://commons.wikimedia.org/wiki/File:Oase_2_skull_(Homo_sapiens).jpg ↗
- https://sketchfab.com/3d-models/gibraltal-1-skull-142e4b654c6e474ba1eba1a758b76d90 ↗
- https://sketchfab.com/3d-models/8a9dd751934d4f6eac5cd4b086b05e27 ↗
- https://sketchfab.com/3d-models/7a661bacdf3d490ba845b01294ccab5f ↗
- https://sketchfab.com/3d-models/58f125cde4bc46018a877c28b00db68e ↗
- https://sketchfab.com/3d-models/7cdccfea780e45cfac958fd97a86ad71 ↗
- https://sketchfab.com/3d-models/51b7777b24084bf5b1ab4f7fe20f2e5a ↗
- https://sketchfab.com/3d-models/homo-neanderthalensis-la-ferrassie-1-deee9c36d66548ef82a7ae32c25a707b ↗
- https://sketchfab.com/3d-models/6b2a89509c3f43968495e388946a1148 ↗
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- https://www.youtube.com/watch?v=jxwdsU02G7U ↗
- https://elements.envato.com/tibetan-plateau-V7AQ65E ↗
- https://www.esa.int/ESA_Multimedia/Videos/2016/06/Earth_from_Space_Southern_Tibetan_Plateau ↗
- https://github.com/StephanePeyregne/calibratePSMC ↗
- https://www.youtube.com/watch?v=jdYwMLSNHnU ↗
- https://www.youtube.com/watch?v=NKWLVNGFrno ↗
- https://www.youtube.com/watch?v=CNZKTm0khYM ↗
- https://www.youtube.com/watch?v=XGfhcHE55o4 ↗
Music
- Original score
AgentHouse · Project-made score (From Cosmos to Civilization score catalog v4 with bespoke opening and closing)
Impulse responses: Detmold University of Music SRIR database, CC BY 4.0.
Footage and image usage
Credits and usage times retained from the published edition or its production credit record. Where present, times identify visual appearances, not documentary chapters. Source and licence corrections are listed in the visual credits above.
- ADDICTIVE_STOCK — 0:49-0:53
- Alba Bossoms Mesa, Elena Essel, Stéphane Peyrégne, Arev P. Sümer, Leonardo N. M. Iasi, Christian Heide, Divyaratan Popli, Cesare de Filippo, Marie-Theres Gansauge, Lars Gerullat, Laurin Lippik, Sarah Nagel, Birgit Nickel, Barbara Schellbach, Anna Schmidt, Johann Visagie, Antje Weihmann, Hugo Zeberg, Julia Zorn, Hélène Rougier, Isabelle Crevecoeur, Patrick Semal, Grégory Abrams, Thibaut Devièse, Stéphane Pirson, Kévin Di Modica, Pierre Cattelain, Christelle Draily, Michel Toussaint, Isabelle De Groote, Frido Welker, Cosimo Posth, Marie Soressi, Jean-Jacques Hublin, Johannes Krause, Svante Pääbo, Matthias Meyer, Janet Kelso, Benjamin M. Peter and Mateja Hajdinjak; bone photographs: E. Dewamme / Royal Belgian Institute of Natural Sciences, Hélène Rougier et al. and Q. Cosnefroy et al.; map data: Natural Earth — 11:14-11:19
- AmazingAerial — 12:14-12:15
- Anetlanda — 12:15-12:20
- Ansgar Koreng — 9:06-9:13, 10:19-10:29
- BlackBoxGuild — 5:55-6:00, 11:04-11:07, 11:07-11:11, 11:22-11:25, 11:32-11:36, 11:53-11:55, 12:12-12:14, 12:34-12:38
- cavanimages — 0:55-0:57
- Clumsystiggy — 1:49-1:57
- Dongju Zhang — 12:38-12:47
- evgeniyqw — 6:23-6:27
- FrameStock — 13:15-13:25
- Fu et al. (2025) — 4:50-4:54, 2:42-2:58, 3:02-3:16, 3:47-3:57, 4:44-4:50, 5:08-5:17, 5:42-5:47, 9:57-10:00, 10:12-10:14, 11:44-11:52
- Geoff M. Smith — 7:10-7:17
- Gibmetal77 — 12:20-12:27
- hu7886720 — 5:47-5:55
- ivz — 13:25-13:28
- Jan Kranendonk — 6:18-6:23
- Kay Prüfer, Cosimo Posth, He Yu, Alexander Stoessel, Maria A. Spyrou, Thibaut Deviese, Marco Mattonai, Erika Ribechini, Thomas Higham, Petr Velemínský, Jaroslav Brůžek and Johannes Krause — 7:59-8:06, 8:06-8:19, 8:57-9:03
- Marcel Weiss — 7:05-7:10
- Michal Ritter — 8:19-8:23
- mmmvideos — 7:50-7:52
- mountaikens — 7:36-7:41
- Natural Earth — 0:07-0:15, 0:35-0:40, 1:33-1:49, 3:27-3:35, 3:43-3:47, 4:25-4:35, 5:26-5:33, 9:19-9:25, 9:52-9:57, 10:36-10:40, 10:40-10:54
- Pastorius — 7:55-7:59
- Pro-Stock — 3:16-3:19, 3:19-3:25
- punyawee22 — 4:38-4:39
- ronib1979 — 1:57-2:03, 2:26-2:28
- Royal Belgian Institute of Natural Sciences — 11:19-11:22
- Service de biologie du comportement (ULiège) — 2:13-2:20
- Stockagent_io — 7:32-7:36
- stu_dio_sd — 11:25-11:26
- TDFly — 11:26-11:28
- Thilo Parg — 6:55-7:01, 7:01-7:05
- Tim Schüler (TLDA) — 7:17-7:26
- Tim Schüler (TLDA); Josephine Schubert, Museum Burg Ranis — 6:42-6:55
- Unità di Antropologia — 2:10-2:13
- Visit Gibraltar — 11:55-12:03
- WhiteMountMedia — 4:54-5:02
- wildlifeandnaturestudios — 0:53-0:55
- world_footage — 2:03-2:05
- Xtremelevel — 3:57-4:04
- Демин Алексей Барнаул (Aleksei Demin) — 5:33-5:42
How this film was made
Created and editorially directed by Anders Lunde using a custom production system developed over six months. AI assists research, drafting, programming, and visual production; I review and edit the material and make the final editorial decisions. Narration uses text-to-speech. Visuals combine custom-built scientific animations, AI-generated reconstructions, and credited scientific imagery.
Generated reconstructions illustrate scientific interpretations. They are distinct from photographs, specimens, and measured data.
More about the creator and production →